title: An immunohistochemical study of basement membrane heparan sulfate proteoglycan (perlecan) in oral epithelial dysplasia and squamous cell carcinoma.
abstract: BACKGROUND
  Basement membrane heparan sulfate proteoglycan (perlecan) has been demonstrated in precancer lesions and carcinomas of oral cavity. It helps in malignant transformation of epithelial cells. The aim of our study was to understand the immuno-localization of perlecan in oral dysplastic epithelium and oral carcinomas.
  
  
  METHODS
  A total of 50 cases comprising 10 normal mucosa, 20 dysplastic mucosa, and 20 oral squamous cell carcinomas (OSCC) were included in the retrospective study. They were examined for the presence of perlecan protein core by immunohistochemistry using monoclonal antibody. Interpretation of the pattern of staining was done, and majority of the observations were taken for statistical analysis.
  
  
  RESULTS
  In normal epithelium, perlecan was found to be present in basal layer at the cell border. In dysplastic epithelium, it was present in suprabasal layers also. With the increase in severity of dysplasia, its expression was more in suprabasal layers, and the immuno-localization was found to be at cell border and cytoplasm. In OSCC cases, perlecan was present in stroma and tumor islands.
  
  
  CONCLUSIONS
  It was deduced from the above results that perlecan helps potentially in dysplastic changes of epithelial cells. It gets accumulated within the cell and intercellular spaces and serves as a reservoir for various growth factors. In OSCC, it breaks down and releases growth factors, which help in tumor progression, angiogenesis, and metastasis of the carcinoma.
authors.affiliation: Department of Oral Pathology, ITS Dental College and Hospital, Greater Noida, Delhi-NCR, India.
authors.forename: Mithilesh
authors.initials: M
authors.lastname: Mishra
authors.forename: Vidyadevi
authors.initials: V
authors.lastname: Chandavarkar
authors.forename: Veena V
authors.initials: VV
authors.lastname: Naik
authors.forename: Alka D
authors.initials: AD
authors.lastname: Kale
keywords: Dysplasia; growth factors; intercellular space; oral cancer; perlecan